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Commit 9b747530 authored by Heiko Carstens's avatar Heiko Carstens Committed by Marcelo Tosatti
Browse files

s390/smp/kvm: unifiy sigp definitions 



The smp and the kvm code have different defines for the sigp order codes.
Let's just have a single place where these are defined.
Also move the sigp condition code and sigp cpu status bits to the new
sigp.h header file.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 9d04edd2

arch/s390/include/asm/sigp.h

0 → 100644
+31 −0
Original line number Diff line number Diff line 
#ifndef __S390_ASM_SIGP_H

#define __S390_ASM_SIGP_H



/* SIGP order codes */

#define SIGP_SENSE		      1

#define SIGP_EXTERNAL_CALL	      2

#define SIGP_EMERGENCY_SIGNAL	      3

#define SIGP_STOP		      5

#define SIGP_RESTART		      6

#define SIGP_STOP_AND_STORE_STATUS    9

#define SIGP_INITIAL_CPU_RESET	     11

#define SIGP_SET_PREFIX		     13

#define SIGP_STORE_STATUS_AT_ADDRESS 14

#define SIGP_SET_ARCHITECTURE	     18

#define SIGP_SENSE_RUNNING	     21



/* SIGP condition codes */

#define SIGP_CC_ORDER_CODE_ACCEPTED 0

#define SIGP_CC_STATUS_STORED	    1

#define SIGP_CC_BUSY		    2

#define SIGP_CC_NOT_OPERATIONAL	    3



/* SIGP cpu status bits */



#define SIGP_STATUS_CHECK_STOP		0x00000010UL

#define SIGP_STATUS_STOPPED		0x00000040UL

#define SIGP_STATUS_INVALID_PARAMETER	0x00000100UL

#define SIGP_STATUS_INCORRECT_STATE	0x00000200UL

#define SIGP_STATUS_NOT_RUNNING		0x00000400UL



#endif /* __S390_ASM_SIGP_H */

arch/s390/kernel/smp.c

+24 −48
Original line number Diff line number Diff line
@@ -44,33 +44,9 @@ 
#include <asm/vdso.h>

#include <asm/debug.h>

#include <asm/os_info.h>

#include <asm/sigp.h>

#include "entry.h"



enum {

	sigp_sense = 1,

	sigp_external_call = 2,

	sigp_emergency_signal = 3,

	sigp_start = 4,

	sigp_stop = 5,

	sigp_restart = 6,

	sigp_stop_and_store_status = 9,

	sigp_initial_cpu_reset = 11,

	sigp_cpu_reset = 12,

	sigp_set_prefix = 13,

	sigp_store_status_at_address = 14,

	sigp_store_extended_status_at_address = 15,

	sigp_set_architecture = 18,

	sigp_conditional_emergency_signal = 19,

	sigp_sense_running = 21,

};



enum {

	sigp_order_code_accepted = 0,

	sigp_status_stored = 1,

	sigp_busy = 2,

	sigp_not_operational = 3,

};



enum {

	ec_schedule = 0,

	ec_call_function,
@@ -124,7 +100,7 @@ static inline int __pcpu_sigp_relax(u16 addr, u8 order, u32 parm, u32 *status) 


	while (1) {

		cc = __pcpu_sigp(addr, order, parm, status);

		if (cc != sigp_busy)

		if (cc != SIGP_CC_BUSY)

			return cc;

		cpu_relax();

	}
@@ -136,7 +112,7 @@ static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm) 


	for (retry = 0; ; retry++) {

		cc = __pcpu_sigp(pcpu->address, order, parm, &pcpu->status);

		if (cc != sigp_busy)

		if (cc != SIGP_CC_BUSY)

			break;

		if (retry >= 3)

			udelay(10);
@@ -146,8 +122,8 @@ static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm) 


static inline int pcpu_stopped(struct pcpu *pcpu)

{

	if (__pcpu_sigp(pcpu->address, sigp_sense,

			0, &pcpu->status) != sigp_status_stored)

	if (__pcpu_sigp(pcpu->address, SIGP_SENSE,

			0, &pcpu->status) != SIGP_CC_STATUS_STORED)

		return 0;

	/* Check for stopped and check stop state */

	return !!(pcpu->status & 0x50);
@@ -155,8 +131,8 @@ static inline int pcpu_stopped(struct pcpu *pcpu) 


static inline int pcpu_running(struct pcpu *pcpu)

{

	if (__pcpu_sigp(pcpu->address, sigp_sense_running,

			0, &pcpu->status) != sigp_status_stored)

	if (__pcpu_sigp(pcpu->address, SIGP_SENSE_RUNNING,

			0, &pcpu->status) != SIGP_CC_STATUS_STORED)

		return 1;

	/* Status stored condition code is equivalent to cpu not running. */

	return 0;
@@ -181,7 +157,7 @@ static void pcpu_ec_call(struct pcpu *pcpu, int ec_bit) 


	set_bit(ec_bit, &pcpu->ec_mask);

	order = pcpu_running(pcpu) ?

		sigp_external_call : sigp_emergency_signal;

		SIGP_EXTERNAL_CALL : SIGP_EMERGENCY_SIGNAL;

	pcpu_sigp_retry(pcpu, order, 0);

}
@@ -214,7 +190,7 @@ static int __cpuinit pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) 
		goto out;

#endif

	lowcore_ptr[cpu] = lc;

	pcpu_sigp_retry(pcpu, sigp_set_prefix, (u32)(unsigned long) lc);

	pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);

	return 0;

out:

	if (pcpu != &pcpu_devices[0]) {
@@ -229,7 +205,7 @@ out: 


static void pcpu_free_lowcore(struct pcpu *pcpu)

{

	pcpu_sigp_retry(pcpu, sigp_set_prefix, 0);

	pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0);

	lowcore_ptr[pcpu - pcpu_devices] = NULL;

#ifndef CONFIG_64BIT

	if (MACHINE_HAS_IEEE) {
@@ -288,7 +264,7 @@ static void pcpu_start_fn(struct pcpu *pcpu, void (*func)(void *), void *data) 
	lc->restart_fn = (unsigned long) func;

	lc->restart_data = (unsigned long) data;

	lc->restart_source = -1UL;

	pcpu_sigp_retry(pcpu, sigp_restart, 0);

	pcpu_sigp_retry(pcpu, SIGP_RESTART, 0);

}



/*
@@ -309,7 +285,7 @@ static void pcpu_delegate(struct pcpu *pcpu, void (*func)(void *), 
	if (pcpu->address == restart.source)

		func(data);	/* should not return */

	/* Stop target cpu (if func returns this stops the current cpu). */

	pcpu_sigp_retry(pcpu, sigp_stop, 0);

	pcpu_sigp_retry(pcpu, SIGP_STOP, 0);

	/* Restart func on the target cpu and stop the current cpu. */

	memcpy_absolute(&lc->restart_stack, &restart, sizeof(restart));

	asm volatile(
@@ -388,8 +364,8 @@ void smp_emergency_stop(cpumask_t *cpumask) 
	for_each_cpu(cpu, cpumask) {

		struct pcpu *pcpu = pcpu_devices + cpu;

		set_bit(ec_stop_cpu, &pcpu->ec_mask);

		while (__pcpu_sigp(pcpu->address, sigp_emergency_signal,

				   0, NULL) == sigp_busy &&

		while (__pcpu_sigp(pcpu->address, SIGP_EMERGENCY_SIGNAL,

				   0, NULL) == SIGP_CC_BUSY &&

		       get_clock() < end)

			cpu_relax();

	}
@@ -425,7 +401,7 @@ void smp_send_stop(void) 
	/* stop all processors */

	for_each_cpu(cpu, &cpumask) {

		struct pcpu *pcpu = pcpu_devices + cpu;

		pcpu_sigp_retry(pcpu, sigp_stop, 0);

		pcpu_sigp_retry(pcpu, SIGP_STOP, 0);

		while (!pcpu_stopped(pcpu))

			cpu_relax();

	}
@@ -436,7 +412,7 @@ void smp_send_stop(void) 
 */

void smp_stop_cpu(void)

{

	pcpu_sigp_retry(pcpu_devices + smp_processor_id(), sigp_stop, 0);

	pcpu_sigp_retry(pcpu_devices + smp_processor_id(), SIGP_STOP, 0);

	for (;;) ;

}
@@ -590,7 +566,7 @@ static void __init smp_get_save_area(int cpu, u16 address) 
	}

#endif

	/* Get the registers of a non-boot cpu. */

	__pcpu_sigp_relax(address, sigp_stop_and_store_status, 0, NULL);

	__pcpu_sigp_relax(address, SIGP_STOP_AND_STORE_STATUS, 0, NULL);

	memcpy_real(save_area, lc + SAVE_AREA_BASE, sizeof(*save_area));

}
@@ -599,8 +575,8 @@ int smp_store_status(int cpu) 
	struct pcpu *pcpu;



	pcpu = pcpu_devices + cpu;

	if (__pcpu_sigp_relax(pcpu->address, sigp_stop_and_store_status,

			      0, NULL) != sigp_order_code_accepted)

	if (__pcpu_sigp_relax(pcpu->address, SIGP_STOP_AND_STORE_STATUS,

			      0, NULL) != SIGP_CC_ORDER_CODE_ACCEPTED)

		return -EIO;

	return 0;

}
@@ -621,8 +597,8 @@ static struct sclp_cpu_info *smp_get_cpu_info(void) 
	if (info && (use_sigp_detection || sclp_get_cpu_info(info))) {

		use_sigp_detection = 1;

		for (address = 0; address <= MAX_CPU_ADDRESS; address++) {

			if (__pcpu_sigp_relax(address, sigp_sense, 0, NULL) ==

			    sigp_not_operational)

			if (__pcpu_sigp_relax(address, SIGP_SENSE, 0, NULL) ==

			    SIGP_CC_NOT_OPERATIONAL)

				continue;

			info->cpu[info->configured].address = address;

			info->configured++;
@@ -734,8 +710,8 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle) 
	pcpu = pcpu_devices + cpu;

	if (pcpu->state != CPU_STATE_CONFIGURED)

		return -EIO;

	if (pcpu_sigp_retry(pcpu, sigp_initial_cpu_reset, 0) !=

	    sigp_order_code_accepted)

	if (pcpu_sigp_retry(pcpu, SIGP_INITIAL_CPU_RESET, 0) !=

	    SIGP_CC_ORDER_CODE_ACCEPTED)

		return -EIO;



	rc = pcpu_alloc_lowcore(pcpu, cpu);
@@ -795,7 +771,7 @@ void __cpu_die(unsigned int cpu) 
void __noreturn cpu_die(void)

{

	idle_task_exit();

	pcpu_sigp_retry(pcpu_devices + smp_processor_id(), sigp_stop, 0);

	pcpu_sigp_retry(pcpu_devices + smp_processor_id(), SIGP_STOP, 0);

	for (;;) ;

}

arch/s390/kvm/sigp.c

+9 −37
Original line number Diff line number Diff line
@@ -15,38 +15,10 @@ 
#include <linux/kvm.h>

#include <linux/kvm_host.h>

#include <linux/slab.h>

#include <asm/sigp.h>

#include "gaccess.h"

#include "kvm-s390.h"



/* sigp order codes */

#define SIGP_SENSE             0x01

#define SIGP_EXTERNAL_CALL     0x02

#define SIGP_EMERGENCY         0x03

#define SIGP_START             0x04

#define SIGP_STOP              0x05

#define SIGP_RESTART           0x06

#define SIGP_STOP_STORE_STATUS 0x09

#define SIGP_INITIAL_CPU_RESET 0x0b

#define SIGP_CPU_RESET         0x0c

#define SIGP_SET_PREFIX        0x0d

#define SIGP_STORE_STATUS_ADDR 0x0e

#define SIGP_SET_ARCH          0x12

#define SIGP_SENSE_RUNNING     0x15



/* cpu status bits */

#define SIGP_STAT_EQUIPMENT_CHECK   0x80000000UL

#define SIGP_STAT_NOT_RUNNING	    0x00000400UL

#define SIGP_STAT_INCORRECT_STATE   0x00000200UL

#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL

#define SIGP_STAT_EXT_CALL_PENDING  0x00000080UL

#define SIGP_STAT_STOPPED           0x00000040UL

#define SIGP_STAT_OPERATOR_INTERV   0x00000020UL

#define SIGP_STAT_CHECK_STOP        0x00000010UL

#define SIGP_STAT_INOPERATIVE       0x00000004UL

#define SIGP_STAT_INVALID_ORDER     0x00000002UL

#define SIGP_STAT_RECEIVER_CHECK    0x00000001UL





static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,

			u64 *reg)

{
@@ -65,7 +37,7 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr, 
		rc = 1; /* status stored */

	} else {

		*reg &= 0xffffffff00000000UL;

		*reg |= SIGP_STAT_STOPPED;

		*reg |= SIGP_STATUS_STOPPED;

		rc = 1; /* status stored */

	}

	spin_unlock(&fi->lock);
@@ -235,7 +207,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, 
	address = address & 0x7fffe000u;

	if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||

	   copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {

		*reg |= SIGP_STAT_INVALID_PARAMETER;

		*reg |= SIGP_STATUS_INVALID_PARAMETER;

		return 1; /* invalid parameter */

	}
@@ -249,7 +221,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, 


	if (li == NULL) {

		rc = 1; /* incorrect state */

		*reg &= SIGP_STAT_INCORRECT_STATE;

		*reg &= SIGP_STATUS_INCORRECT_STATE;

		kfree(inti);

		goto out_fi;

	}
@@ -258,7 +230,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address, 
	/* cpu must be in stopped state */

	if (!(atomic_read(li->cpuflags) & CPUSTAT_STOPPED)) {

		rc = 1; /* incorrect state */

		*reg &= SIGP_STAT_INCORRECT_STATE;

		*reg &= SIGP_STATUS_INCORRECT_STATE;

		kfree(inti);

		goto out_li;

	}
@@ -300,7 +272,7 @@ static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr, 
		} else {

			/* not running */

			*reg &= 0xffffffff00000000UL;

			*reg |= SIGP_STAT_NOT_RUNNING;

			*reg |= SIGP_STATUS_NOT_RUNNING;

			rc = 0;

		}

	}
@@ -375,7 +347,7 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu) 
		vcpu->stat.instruction_sigp_external_call++;

		rc = __sigp_external_call(vcpu, cpu_addr);

		break;

	case SIGP_EMERGENCY:

	case SIGP_EMERGENCY_SIGNAL:

		vcpu->stat.instruction_sigp_emergency++;

		rc = __sigp_emergency(vcpu, cpu_addr);

		break;
@@ -383,12 +355,12 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu) 
		vcpu->stat.instruction_sigp_stop++;

		rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);

		break;

	case SIGP_STOP_STORE_STATUS:

	case SIGP_STOP_AND_STORE_STATUS:

		vcpu->stat.instruction_sigp_stop++;

		rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP |

						 ACTION_STOP_ON_STOP);

		break;

	case SIGP_SET_ARCH:

	case SIGP_SET_ARCHITECTURE:

		vcpu->stat.instruction_sigp_arch++;

		rc = __sigp_set_arch(vcpu, parameter);

		break;